Updated sources.md

Author: Joyakis

sources.md

@@ -171,15 +171,18 @@ adjust video parameters, and obtain search results.
 
 ## EUROPEANA DATA API
 
-**Description:** The Europeana Search API provides access to digital cultural heritage records from museums, libraries, and archives across Europe
+**Description:**
+The **Europeana Search API** provides access to digital cultural heritage metadata records aggregated from museums, libraries, and archives across Europe.
+This project uses the API to fetch aggregated counts of cultural heritage records by data provider, rights statement, and theme.
 
-**API Documentation link:**
-- [Search API](https://europeana.atlassian.net/wiki/spaces/EF/pages/2385739812/Search+API+Documentation)
+**Official API Documentation:**
+- [Search API Documentation](https://europeana.atlassian.net/wiki/spaces/EF/pages/2385739812/Search+API+Documentation)
 
 **API information:**
- - API key required
- - Query parameters allow:
- - Full-text searching (query)
- - Retrieving only metadata facets (e.g. via profile=facets)
- - Data returned in JSON format
- - Uses offset based pagination
+- API key required
+- Query parameters allow:
+  - Full-text searching (`query`)
+  - Retrieving metadata facets (`profile=facets`)
+  - Filtering by data provider, rights statement, and theme
+- Data available through JSON format
+- Offset-based pagination